From 0b07a1e96242f55278800a3deea0238ea4abd3b3 Mon Sep 17 00:00:00 2001
From: Stefan Rueger <stefan.rueger@urclocks.com>
Date: Sun, 21 Apr 2024 14:43:00 +0100
Subject: [PATCH] Move static signature_cache to PDATA

---
 src/jtag3.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/jtag3.c b/src/jtag3.c
index 04dc8f39..ad1ae3d2 100644
--- a/src/jtag3.c
+++ b/src/jtag3.c
@@ -97,6 +97,8 @@ struct pdata
 
   /* Function to set the appropriate clock parameter */
   int (*set_sck)(const PROGRAMMER *, unsigned char *);
+
+  unsigned char signature_cache[2]; // Used in jtag3_read_byte()
 };
 
 #define PDATA(pgm) ((struct pdata *)(pgm->cookie))
@@ -2235,8 +2237,6 @@ static int jtag3_read_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM
     *value = PDATA(pgm)->sib_string[addr];
     return 0;
   } else if (mem_is_signature(mem)) {
-    static unsigned char signature_cache[2];
-
     cmd[3] = MTYPE_SIGN_JTAG;
 
     /*
@@ -2252,13 +2252,13 @@ static int jtag3_read_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM
       if ((status = jtag3_command(pgm, cmd, 12, &resp, "read memory")) < 0)
         return status;
 
-      signature_cache[0] = resp[4];
-      signature_cache[1] = resp[5];
+      PDATA(pgm)->signature_cache[0] = resp[4];
+      PDATA(pgm)->signature_cache[1] = resp[5];
       *value = resp[3];
       free(resp);
       return 0;
     } else if (addr <= 2) {
-      *value = signature_cache[addr - 1];
+      *value = PDATA(pgm)->signature_cache[addr - 1];
       return 0;
     } else {
       /* should not happen */